Island



glatten gratis @anni @fitta .IOHN S. RARD'RN, or PROVIDENCE, RHODR ISLAND, ASSIGNOR TO ,HIMSELF AND DANIEL N. PIOKHRING, or BOSTON, MASSACHUSETTS.

Letters Patent Nol 79,803,1iqted July 14, 1868.

dit .tlgehult referrer tu in time tttttrs rtent mit mating met uf tigt :smut A TO ALL PERSONS TQWHOM THESE PRESENTS MAY COME: I l

Be it -known that .I,'JonN S. BARDEN, of the city and county of Providence, and State of Rhode Island, l have made a new. and useful invention, having reference to what are termed Semi-Rotative Engines, to bcoperated by steam or other suitable elastic motor; and do hereby declarethe samo `to be fully described in the fol-- lowing speciiicatioma'nd represented in the accompanyingdrawings, of which I Figure 1 is a front elevation. 1 1 Figure 2, a side view ofapumping-engine of my improved construction.A

Figure 3, a. vertical sectiontaken through and in linepf the axisjof the shaft of the engine.

Figure 4 is a transverse and vertical section taken through the steam-engine. Figure 5 is a similar section of the pump. Figure 6 is a horizontal section taken through the slraft-axis. A

` Figure 47 is a'side view, i 1 Figure S is abottom view, and l l Figure 9 a top view of the shell or outer case of the piston-valve.

FigurelO is `a side elevation, Figure 11 a bottom view, and Figure 12 a top view of the body part of'such valve.

The cylinder of the steam-engine is shown at A, as composed of a'cylindrical vessel, havingjits'interior space divided by two partitions, ab, and a cylindei, d, into two sectoral chambers, c c. .lhe cylinder d is h xed t on the shaft B-conccntrically, and such shaft extends axially through thocylind'er Ain manner as represented.

1 Packings, e e, to rest against the' periphery of the cylinder ci, are inserted in tle divisional partitions a b.

lwopistons or wings, C D, extend diamctricallyfrom the cylinder c? to the inner periphery of the case A. There are also two passages, .f and g', leading through the pistons, the cylinder d, and theshaft B. These passages'go parallel to one another through the shaft B and 'the cylinder d, Thence each goes through the two pistons in opposite directions, in manner as shown in gfl, the same being so as to open communication between the space over cach piston with that below the o'therjpiston. v

Within the partitionI is a faucet or plug,E, provided with a discharge-passage, 7L, and-two inlets, it', arranged in it in manner as represented. To this'iaucct two branch passages, lc It, lead through the partition b to the expansive lower parts of the twochambers c c, the purpose of the faucet and these passages lek being to enable the chambers to be freed from water resulting from the condensation of steam in thechambers..

On the cylinder A is a cylindrical valve-che'sta-F, whose intrier, Z, is a cylindrical space, closed at its ends.

i An eduction-passage, m, leads out of the 'middle of the bottom ofrthis space l, and in'toadischar'ge-passage,

n, going through the partition aand the rear head of the cylinder A. Furthermore, two ports or passages, op, lead from the space l through the partition a, and into the two chambers c c, such-passages o, m, and p, being arranged as vrepresented' in fig. 4.@ l 1 1 A cylindrical piston-valve, G, is arranged within the spacci, and1 isto fit theretoy and move therein as a piston-head usually dts to and moves Within a cylinder.- 1 1 d l This piston-valve G is constructed of a body, g, and an outer cylindrical tube Or case, r, which are arranged l 1 concentrically, and formed in manneras represented in iigsj. 7, 8,9, 10, 11, and 12. 1 i 1 'r In the to'p of the case 1 is a rectangular'opening, s,"and through its .bottom are three other such Opeth ings, t u c. There is also a. groove, w,'made in its side, -to receive-theond cfaI stud or screw, whichfwith the groove, limits the extent of longitudinal movement of the pston-valve, and holds it iu its right position.

In and around the part g are two grooves, waz, which are directly overthe ports tv. Furthermore, there is a small chamber io the bottom of the port q, whichvis in continuation of the opening'u leading through the shell r. The opening s is continued into the body g, and communicates witlrthe annular passages w a: by horizontal passages y y. y i e f Over the port'l of the steam-chest are two valvecharnbers, a1 a, within each of which is a valve, b, provided with a long stem, c, into which the steam to operate the engine is to be led through a passage,'d. A port or passage, f', leads from the middle of the passage e into the spacel Z.

The stems'cl cl of the valves b b extend down through the space Z, and into the chambers c e, and directly over these pistons, so as to bcraiscd alternatelyhy the said pistons during their oscillating movements.

The shaft of the engine extends ashort distance into a cylindrical pump-case, H, fixed tothe enginecylinder' by a neck, I, and arranged with respect to it in manner as represented. 'lhus the part of the shaft B which enters theinterior space, g, of the puxnpcase is a ring, "I, which isxcd to, and so aste be revolved by, the shgaft'. This ring, and thc end of the shaft B, abut directly against a cylinder, K, which is fastened to the outer head, L, of the pump-case. y I -l Within the pumpcase,and so as tol radiate i n opposite directions from the ring I and the cylinder K, and fastened tothe said ring,`are two pistons or wings, z" k', which extend to the inner periphery of thecase. These pistons are arranged in sectoral., chambers Z m,-whicl1 are-separated from two other sectoral chambers, n o', by partitions p g', arranged and formed as represented.

Openings 7 st u', provided with valves v w xy, arranged as shown in fig. 5, are made through the partitions, so as toopen communication-between the chambers Z m n o. A j

An induction-passage, Z, leads into the chamber 0", and there is an eduction-passage, a2, leading out ofthe chamber n. v

,l'lhere are also. two passages, b2 c2, leading through the block K. Each of such passages opens communication between the space below one piston and that above'the other of the pump-chambers Z m.

By the employment of the stationary cylinder K, arranged with the partitions 21g, the passages of comvmunication, the'shaft B, and the pistons z" Zc, and their connecting-annulus I', I am enabled to make thc passages ZJz c much larger than I could were I to make them through the shaft Il; The same may be said with respect to any arrangement of the passagesfg of the steam-engine, or by arranging them in the pistons C D v and through, the shaft B and cylinder oZ,`though they may be made much larger than they could be were they to be run through the foot d and the shaft- B, for in such case they would have to be very narrow, on account of the pistons, when at work, approaching so closely to the partitions a Z1. v

When steam is let into the passage e of the, steam-chest of the engine, and the shaft- B is-turned, so as to cause onc'c` the pist-dns, C, to rise and throw up its valve bl, steam will pass through the scat of such valve into the steam-chest Z, and by acting against the piston G, will move it endwisc within the chamber Z, so as to enable steam to pass through the passage f', and into the passages s, g/,lun and of the piston-valve G. In this case the annular passage w will be directly over the pprt o, leading t'o the raised piston. The passage u will open -communication between the portp andthe eduction-passage m. The steam will rush through the passage o into fthe space over the piston, O, and will also pass through the passagef into the space below the piston D. `The steam, acting againstv the pistons, will move them in opposite directions until the piston D may be thrown up .against its valve-'stem c, so-as to raise the valve b thereof` As soon as .this may take place, the steam will enter the chamber Z and'drive the piston-valve in the direction opposite to what it was previously moved, so as to cause/the steam to produce a reverse movement of the two portions. y The exhaust steam of the chamber Z will flow through thevalve-stem passage a3, leading from the space Z into the space-.over the piston G. Such passage a3 should haves.A diametera little greater than that of the valve-stem. The same may be said with respect to the passage b3 of the other valve-stem. Each passage, however, should be of such a diameter as to discharge the exhaust steam so slowly as to cause the pistonvalve to be cushioned by the steamywhile the valve may be in movement, the cushioning of the valve being toprevent its momentum from breaking its stop or stud x, or otherwise doing damage.` e

The pistons will be moved with oscillating movements, so as to impart to the shaft B a reciprocating rotative motion, and causeit to work the two pistons of the pump, which'is @double-acting lifting and force-pump.

I claim as my invention, the combination consisting of the two sectoral chambers ce, the oscillating-pistons C D, the shaft B, the cylinder d, the reciprocatingvalve-piston G, its cylinder'F, and tapped or stemmed valves bl b, arranged and provided with steam-passages lof induction and cduction, thewhole being substantially as `and so as'to operate as described. l

Also, the arrangement of the steam-passagesfg with the pistons C D, the cylinder D, and the shaft B.l

Also, the larrangement and combination ot' the faucet and its branch passages k Zc, with the steam" -l`chambers c c. l

Also, the arrangement of the'valves-b, the rods c thereof, and their passages a3 b3, so as to effect cushioning".y` of the valve-'piston G by the s't-eain,under circumstances as set forth'. lso, the valve-piston. G, constructed of thelshcll 1' and 'b'ody part g, made and arranged together as set forth.

JOHN S. BARDEN.

Witnesses IjI. Euer, F` P. HALE, Jr. 

